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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
Xr250r
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[QUOTE="sb-rider, post: 103080, member: 23293"] Jonala, Wish I owned a lathe! :) Do you remember what size your stock main jet was before going to 140? Out of the options: 1. Drill holes in end of baffle ala Gordon Banks. 2. Cutout the pipe outlet. 3. Remove the stock baffle. 4. Remove the stock baffle and add an aftermarket tip. 5. Add an aftermarket insert (baffle). 6. New aftermarket exhaust. I'm going to go with the first option because I know many others have had great results, its easy to do, its cheap, and I won't make my bike unneccesarily loud (others might not agree the last factor is a "plus") ;) By the way, the June issue of Dirt Bike has a picture that shows how they removed the stock baffle from a 98+ model if you're so inclined. They spot-welded a piece of metal to the end of the baffle and banged on the metal until the baffle welding failed and it broke loose. Looks like a good way to decrease (increase?) stress. Lance [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
Xr250r
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